In line electromagnetic flow measurement transducer
First Claim
1. A liquid flow meter device comprising a disposable sensor section including a tubular member made of nonmagnetic material adapted to be connected into a fluid flow line, and a pair of electrodes extending through the wall of the tubular member and terminating on the inner surface at diametrically opposite points in a common transverse plane, and an electromagnetic section including a C-shaped core forming a pair of opposing poles with a gap between the poles and a winding on the core, a multiple terminal connector having a female receptor section and a male plug section, one of said connector sections being integral with the sensor section in the region of said electrodes, and the other section being mounted adjacent the gap between the poles of the C-shaped core, the two sections of the connector engaging each other by inserting the plug section into the receptor section to complete electrical and mechanical connections between the disposable sensor section and the electromagnetic section when the sensor section is moved into the gap between the poles of the core in a direction transverse to the central part of the core, and means in the sensor section for electrically connecting the electrodes to the terminals of the connector section integral with the tubular member.
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Abstract
An electromagnetic type fluid flow meter for measurements of conductive fluids which utilizes an interchangeable disposable electrode sensor assembly with a common magnetic drive assembly. The electrode sensor assembly includes a tubular member adapted to be connected into a flow line and which includes sensor electrodes and an electrical connector for providing external electrical connections to electrodes. An electromagnetic assembly includes a C-shaped magnetic core and a winding on the core. Parallel guide members on the electromagnetic assembly receive mating guides on either side of the tubular member in sliding engagement to hold the tubular member between the poles of the magnet with the electrodes properly oriented with respect to the flux lines. The electromagnetic assembly includes an electrical connector which engages the connector on the tubular member when it is inserted in the guides.
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Citations
28 Claims
- 1. A liquid flow meter device comprising a disposable sensor section including a tubular member made of nonmagnetic material adapted to be connected into a fluid flow line, and a pair of electrodes extending through the wall of the tubular member and terminating on the inner surface at diametrically opposite points in a common transverse plane, and an electromagnetic section including a C-shaped core forming a pair of opposing poles with a gap between the poles and a winding on the core, a multiple terminal connector having a female receptor section and a male plug section, one of said connector sections being integral with the sensor section in the region of said electrodes, and the other section being mounted adjacent the gap between the poles of the C-shaped core, the two sections of the connector engaging each other by inserting the plug section into the receptor section to complete electrical and mechanical connections between the disposable sensor section and the electromagnetic section when the sensor section is moved into the gap between the poles of the core in a direction transverse to the central part of the core, and means in the sensor section for electrically connecting the electrodes to the terminals of the connector section integral with the tubular member.
- 8. A flow meter assembly comprising first and second separable sections, the first section including a C-shaped magnetic core having parallel end portions and a central transverse portion, a coil wound on the transverse portion, and an electrical terminal connector supported from the core, the second section including a tubular member, a pair of electrodes extending into the tubular member at diametrically opposite points of the tubular member, guide means slidably engaging the end portions of the magnetic core for guiding and supporting the tubular member in position between the ends of the C-shaped core, the guide means when engaging the ends of the core holding the axis of the tubular member and the diametrical axis of the ends of the electrodes in mutually perpendicular position relative to the flux path between the ends of the core when the coil is energized, and an electrical terminal means connected to the electrodes for engaging said electrical terminal connector to complete electrical connections to the electrodes when the second section is inserted between the end portions of the core.
- 12. A flow meter assembly comprising first and second separable sections, the first section including a C-shaped magnetic core having parallel end portions and a central transverse portion, and a coil wound on the transverse portion, the second section including a tubular member, a pair of electrodes extending into the tubular member at diametrically opposite points of the tubular member, guide means slidably engaging the end portions of the magnetic core for guiding and supporting the tubular member in position between the ends of the C-shaped core, the guide means when engaging the ends of the core holding the axis of the tubular member and the diametrical axis of the ends of the electrodes in mutually perpendicular position relative to the flux path between the ends of the core when the coil is energized, the electrodes including portions extending parallel to each other in a common plane parallel to the flux path between the ends of the core, the ends of said electrode portions forming terminals projecting from one side of the second section, and electrical connector means for engaging the terminals to provide external electrical connections to the electrodes.
- 16. A replaceable sensor assembly for a magnetic flow meter of the type using a magnet structure for producing a magnetic field between a pair of spaced poles between which the fluid is directed, comprising a non-conductive body having a pair of spaced parallel passages extending through the body, the body being shaped to slidably engage the magnet structure between the poles, two groups of three electrodes lying in a common plane extending perpendicular to said passages, the electrodes of each group intersecting respective ones of said passages at three spaced points around the circumference of the associated passage, with two of the electrodes intersecting the passage opposite each other along a line.
- 18. A replaceable sensor assembly for a magnetic fluid flow measuring instrument comprising a tubular portion forming a fluid flow passage and a mounting portion surrounding the tubular portion, the mounting portion having a pair of spaced parallel longitudinal guide surfaces extending perpendicular to and on either side of the axes of the tubular portion for guiding the assembly into position in the magnet structure of measuring instrument, and three conductive electrodes having ends terminating in the tubular portion and exposed to fluid passing therethrough, said ends lying in a common plane transverse to the axis of the tubular portion, two of said ends being positioned opposite each other along a common axis extending parallel to the longitudinal guide surfaces and the third end being in a position intermediate said two ends, said electrodes having terminal ends projecting outside the mounting portion in parallel relationship to each other in direction parallel to said longitudinal guide surfaces, to form an electrical connector.
- 20. A flow meter assembly comprising first and second separable sections, the first section including a C-shaped magnetic core having parallel end portions and a central transverse portion, and a coil wound on the transverse portion, the second section including a pair of tubular members, a pair of electrodes extending into each of the tubular members at diametrically opposite points of the tubular members, guide means slidably engaging the end portions of the magnetic core for guiding and supporting the tubular members in position between the ends of the C-shaped core, the guide means when engaging the ends of the core holding the axis of each of the tubular members and the diametrical axis of the ends of the corresponding electrodes in mutually perpendicular position relative to the flux path between the ends of the core when the coil is energized, the electrodes including portions extending parallel to each other in a common plane parallel to the flux path between the ends of the core, the ends of said electrode portions forming terminals projecting from one side of the second section, and electrical connector means for engaging the terminals to provide external electrical connections to the electrodes.
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22. A replaceable sensor assembly for a magnetic flow meter of the type using a magnet structure for producing a magnetic field between a pair of spaced poles, comprising a block having an opening extending therethrough, and three conductive electrodes supported in said block in a common plane extending substantially perpendicular to the direction of the opening with one end of each electrode projecting outside the block in said plane to form three parallel connector pins, the other end of the middle one of the three electrodes intersecting the opening at a first point, one of the outer two electrodes being bent such that the other end of the electrode intersects the opening at a point on the opposite side of the opening and in alignment with the first electrode, the other of the outer two electrodes being bent such that the other end of the electrode intersects the opening at a point on the periphery of the opening that is intermediate the intersecting points of the other two electrodes;
- and wherein the block has elongated guide surfaces adapted to slidably engage the magnet structure, the guide surfaces extending parallel to the connector pins on opposite margins of the block for guiding the block and associated pins into and out of a terminal engaging position in the magnet structure.
- View Dependent Claims (23, 24, 25)
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26. A replaceable sensor assembly for a magnetic flow meter of the type using a magnet structure for producing a magnetic field between a pair of spaced poles, comprising a block having an opening extending therethrough, and three conductive electrodes supported in said block in a common plane extending substantially perpendicular to the direction of the opening with one end of each electrode projecting outside the block in said plane to form three parallel connector pins, the other end of the middle one of the three electrodes intersecting the opening at a first point, one of the outer two electrodes being bent such that the other end of the electrode intersects the opening at a point on the opposite side of the opening and in alignment with the first electrode, the other of the outer two electrodes being bent such that the other end of the electrode intersects the opening at a point on the periphery of the opening that is intermediate the intersecting points of the other two electrodes;
- and further including a second opening through the block parallel to the first opening, and a second group of three electrodes mounted in the block intersecting the second opening respectively on opposite sides of the second opening and at an intermediate point of the second opening.
- View Dependent Claims (27)
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28. A replaceable sensor assembly for a magnetic flow meter of the type using a magnet structure for producing a magnetic field between a pair of spaced poles, comprising a block having an opening extending therethrough, and three conductive electrodes supported in said block in a common plane extending substantially perpendicular to the direction of the opening with one end of each electrode projecting outside the block in said plane to form three parallel connector pins, the other end of the middle one of the three electrodes intersecting the opening at a first point, one of the outer two electrodes being bent such that the other end of the electrode intersects the opening at a point on the opposite side of the opening and in alignment with the first electrode, the other of the outer two electrodes being bent such that the other end of the electrode intersects the opening at a point on the periphery of the opening that is intermediate the intersecting points of the other two electrodes;
- and wherein the block includes keying means limiting the sensor assembly to a single orientation between the spaced poles.
Specification